The Block Size Problem: A Tug-of-War Between Users and Miners
Bitcoin generates blocks, which are groups of transactions, and records the entire transaction history to
date on a blockchain formed by linking these blocks. Blocks are formed approximately once every 10 minutes, and the data size of each block is currently capped at 1MB.
With Bitcoin users spread across the globe and transaction volumes expected to grow even further in the future, a debate has arisen over whether to increase the data limit per block to 8MB or even expand it to 20MB—a debate known as the "block size problem." For users
, a higher transaction volume within each block generated every 10 minutes means faster transaction confirmation speeds, making it more convenient.
If a transaction is not confirmed before the 1MB limit is reached, users must wait until the next block is formed—a wait of at least 10 minutes—and even longer if the network is congested with high transaction volume. On the other hand
, for miners, slower transaction speeds create opportunities to earn additional fees; therefore, as the volume processed at once increases, their potential revenue may decrease. Attention is focused on how to resolve this "block size problem," which reflects differing perspectives between users and miners.
